Flowing River is a river in northern Vietnam , derived from the southwestern slopes of the peak Tay Con Linh (2,419 m) and peak northeast flank Kieu Lien Ti (2402 m) in the massif upstream Chay river , northwest province Ha Giang , crossing the provinces of Lao Cai , Yen Bai and then flows into the River Lot in Doan Hung , province of Phu Tho .
In the book Ants Van Luc of Le Quy Don , the Flowing River, also known as "Lei Ha